LOTOS specification style for OSI

The architecture of OSI is used to derive guidelines for writing LOTOS specifications of distributed systems. In particular, the architectural concepts that underlie service and protocol designs are examined in detail. For each of these concepts a representation in LOTOS is given. Examples are provided of how the LOTOS representations of the concepts are used in the construction of LOTOS specifications of service and protocol designs. The approach described in this paper is motivated by the need to produce distributed system specifications in a more consistent and productive fashion.